diff --git a/main/gamecntl.c b/main/gamecntl.c
index 13603d3cd..6b49f4df2 100644
--- a/main/gamecntl.c
+++ b/main/gamecntl.c
@@ -1451,7 +1451,7 @@ char old_IntMethod;
 
 typedef struct cheat_code
 {
-	char *string;
+	const char *string;
 	int *stateptr;
 } __pack__ cheat_code;